<template>
  <div class="login-container">
    <!-- 数据库初始化提示 -->
    <div v-if="showInitMessage" class="init-message">
      <el-alert
        :title="initMessage"
        :type="initMessageType"
        :closable="false"
        show-icon>
      </el-alert>
    </div>

    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">

      <div class="title-container">
        <h3 class="title">API管理平台</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="用户名"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="密码"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登录</el-button>

      <div class="tips">
        <span>用户名: admin</span>
        <span>密码: 123456</span>
      </div>

    </el-form>
  </div>
</template>

<script>
import { validUsername } from '@/utils/validate';
import { checkInitStatus, initDatabase } from '@/api/init';

export default {
  name: 'UserLogin',
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error('请输入正确的用户名'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('密码不能少于6位'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined,
      showInitMessage: false,
      initMessage: '',
      initMessageType: 'info'
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  async mounted() {
    // 检查数据库初始化状态
    await this.checkDatabaseInit()
  },
  methods: {
    async checkDatabaseInit() {
      try {
        this.showInitMessage = true
        this.initMessage = '正在检查数据库初始化状态...'
        this.initMessageType = 'info'

        const response = await checkInitStatus()
        
        if (response.data && !response.data.initialized) {
          // 数据库未初始化，自动进行初始化
          this.initMessage = '数据库未初始化，正在自动初始化...'
          this.initMessageType = 'warning'
          
          const initResponse = await initDatabase()
          
          if (initResponse.data) {
            this.initMessage = `数据库初始化成功！管理员账号: ${initResponse.data.admin_username}，密码: ${initResponse.data.admin_password}`
            this.initMessageType = 'success'
            
            // 更新登录表单的默认值
            this.loginForm.username = initResponse.data.admin_username
            this.loginForm.password = initResponse.data.admin_password
            
            // 5秒后隐藏提示信息
            setTimeout(() => {
              this.showInitMessage = false
            }, 5000)
          }
        } else {
          // 数据库已初始化
          this.showInitMessage = false
        }
      } catch (error) {
        console.error('数据库初始化检查失败:', error)
        this.initMessage = '数据库初始化检查失败，请手动刷新页面重试'
        this.initMessageType = 'error'
        
        // 10秒后隐藏错误信息
        setTimeout(() => {
          this.showInitMessage = false
        }, 10000)
      }
    },

    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm)
            .then(() => {
              // 使用replace而不是push来避免导航守卫错误
              this.$router.replace({ path: this.redirect || '/' })
              this.loading = false
            })
            .catch(() => {
              this.loading = false
            })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标问题 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .init-message {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 600px;
    z-index: 9999;
  }

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>